GX-281 Liquid Handler

This liquid handler provides a versatile, large capacity platform that can be configured for injection, fraction collection, and re-injection as part of a semi-preparative or preparative HPLC purification system. With optional accessories, it can also be used as a flexible liquid handler for performing a wide variety of automated, unattended liquid handling applications.

Flexible Injection Options, Consistent Flow Rates

This liquid handler features the GX Solvent System with immediate access for up to five solvents. The GX Solvent System is a novel syringeless solvent delivery system that offers a large dynamic working range of 2 µL to 100 mL and flow rates of 1 µL/min to 25 mL/min, without changing or replacing syringes to accommodate the different volumes and flow rates. The Direct Injection Module offers an injection port that is integrated into the valve, removing a source of potential carryover.

Flow Path Optimization

The continuous flow path design on all injection valves allows the system flow to continue even as the injection valve switches from load to inject, ensuring consistent pressure and flow for flow rates up to 200 mL/min. With separate injection and collection pathways, this liquid handler ensures that fractions are never contaminated from the injection process.

Space-saving Design

With its enhanced bed capacity, this liquid handler takes up only 33 inches of linear bench space. The bed design holds up to six sample racks (up to 576 13-mm test tubes on bed) in an extremely efficient and open design. It also features the Jet Wash Rinse system, which includes a high-flow rinse pump that provides fast and efficient probe cleaning with up to six rinse solvents.

Specifications

GX-281 Liquid Handler

Contact Control

Four inputs (contact closure, TTL), four relay outputs, four switched +24V DC 1A outputs, one safety input, and one analog input

Note: For your safety, do not switch voltages higher than 30V even though the output contacts are rated for high voltage.

Data Acquisition

An input channel for analog-to-digital conversion

Input impedance: More than 100K ohms

Input voltage range: -1.0V to +1.0V

Input resolution: 10μV

Environmental Conditions Indoor use
Altitude: up to 2000 m
Temperature range: 5°–40°C
Air pressure: 75–105 kPa
Humidity: Maximum relative humidity 80% for temperatures up to 31°C, decreasing linearly to 50% relative humidity at 40°C
Liquid Handling† Accuracy: ±2% for (100 μL–25 mL) water
Reproducibility: <2%
Front Panel ON/OFF and STOP soft keys and LED indicator light for power
Fuse 5 x 20 mm “T” type 5.0A
One for 100–120V; two for 220–240V
Horizontal Motion Strength

X: 1.4 kg

Y: 0.7 kg

Z: 5.4 kg

Injection Carryover† <0.005%
Injection Reproducibility † <1.0% CV (total loop injection), <3.5% (partial loop injection)
Reservoir Solvents Up to 5
Rinse Solvents Up to 6
Rinse Speed High: 200 rpm
Low: 120 rpm
Power Requirements Frequency: 50 to 60 Hz
Voltage: 100–240V (Universal Input)
Current rating: 5.0A for 100–120V or 2.5A for 220–240V
Power consumption: 500W maximum
Fraction Collector 3-way Valve 3-port, PTFE, 114 μL internal volume, 10 μL dead volume, up to 200 mL/min
Sampler Type X/Y/Z with stationary rack design
Software Control Gilson TRILUTION Software
Solvent Delivery Dynamic Range*

2 μL to >100 mL

*For volumes below 100 μL, Liquid Handling and Injection specifi cations may diff er from those listed above.

Flow Rate Up to 25 mL/min
Liquid Contact Materials Valcon H, Nitronic 60 (N60), PTFE
Vertical Punch Strength 4.5 kg
Display Two lines of 40 alphanumeric characters; vacuum fluorescent display
Instrument Weight 68 kg
Dimensions (W x D x H) 88.9 x 76.2 x 96.5 cm (35 x 30 x 38 in)
†:Contact Gilson Customer Service to learn what methods and conditions were used to obtain the values.

Supporting Literature

Technical Notes
TN224 Automation of Post-Purification Analysis Sample Prep Download (EN)    
Milk Testing of Lipolysis and Protein Matter Download (EN)    

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